Microstructure development during dissimilar welding: Case of laser welding of Ti with Ni involving intermetallic phase formation

Chatterjee, Subhradeep; Abinandanan, T.A.; Chattopadhyay, K.

doi:10.1007/s10853-006-6480-4

Cited by 62 publications

(23 citation statements)

References 20 publications

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“…Meanwhile, NiTi was detected in all samples, as shown in Figure 7. The results obtained are similar to the study done by Chatterjee et al who investigated the microstructural development of NiTi and NiTi 2 during dissimilar metal welding of Ti and Ni [12]. The phases were detected at the weld pool beside the HAZ of Inconel 600.…”

Section: Metallurgical Characterizationsupporting

confidence: 89%

“…The formation of these intermetallic phases is reportedly attributed to the crystallographic mismatch between Ni and Ti. microstructural development of NiTi and NiTi2 during dissimilar metal welding of Ti and Ni [12]. The phases were detected at the weld pool beside the HAZ of Inconel 600.…”

Section: Metallurgical Characterizationmentioning

confidence: 96%

“…In a study by Chartterjee et al, dissimilar metal welding of pure Ti and Ni was performed using high-power CO 2 laser butt welding. The results showed that an asymmetric weld shape formed and brittle intermetallic compounds of NiTi 2 and Ni 3 Ti were obtained in the macroscopic shape of the weld pool [12]. The crystallographic mismatch between Ni and Ti led to the formation of intermetallic layers such as NiTi 2 .…”

Section: Introductionmentioning

confidence: 97%

“…Ti-Ni dissimilar butt welding using CO 2 laser showed asymmetric weld shapes and brittle intermetallic compounds. NiTi 2 and Ni 3 Ti were formed with macroscopic cracks in the weld [12]. Carpinteri et al investigated welded T-joints and stated that fatigue failure in structures is caused by stress concentrators, which are also the preferred points for crack initiation [13].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of the Overlapping Factor and Welding Speed on T-Joint Welding of Ti6Al4V and Inconel 600 Using Low-Power Fiber Laser

Janasekaran

Tan

Yusof

et al. 2016

Metals

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Double-sided laser beam welding of skin-stringer joints is an established method for many applications. However, in certain cases with limited accessibility, single-sided laser beam joining is considered. In the present study, single-sided welding of titanium alloy Ti6Al4V and nickel-based alloy Inconel 600 in a T-joint configuration was carried out using continuous-wave (CW), low-power Ytterbium (Yb)-fiber laser. The influence of the overlapping factor and welding speed of the laser beam on weld morphology and properties was investigated using scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. XRD analysis revealed the presence of intermetallic layers containing NiTi and NiTi 2 at the skin-stringer joint. The strength of the joints was evaluated using pull testing, while the hardness of the joints was analyzed using Vickers hardness measurement at the base metal (BM), fusion zone (FZ) and heat-affected zone (HAZ). The results showed that the highest force needed to break the samples apart was approximately 150 N at a laser welding power of 250 W, welding speed of 40 mm/s and overlapping factor of 50%. During low-power single-sided laser welding, the properties of the T-joints were affected by the overlapping factor and laser welding speed.

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Section: Metallurgical Characterizationsupporting

confidence: 89%

Section: Metallurgical Characterizationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the Overlapping Factor and Welding Speed on T-Joint Welding of Ti6Al4V and Inconel 600 Using Low-Power Fiber Laser

Janasekaran

Tan

Yusof

et al. 2016

Metals

View full text Add to dashboard Cite

show abstract

“…[4][5][6][7] Studies have also been undertaken to elucidate the underlying mechanisms of microstructure formation in these welds in terms of fundamentals of solidification theory. [8][9][10][11] In this latter set of experiments, regions close to the fusion interfaces revealed microstructures that were remarkably different from the ones observed during welding of similar metals, and in this article, we seek to address some of the issues related to this aspect of dissimilar welding.…”

Section: Ever Since Metzger Et Alõs Substantial Initial Workmentioning

confidence: 99%

Phase-Field Simulation of Fusion Interface Events during Solidification of Dissimilar Welds: Effect of Composition Inhomogeneity

Chatterjee

Abinandanan

Chattopadhyay

2007

Metall Mater Trans A

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We investigate the events near the fusion interfaces of dissimilar welds using a phase-field model developed for single-phase solidification of binary alloys. The parameters used here correspond to the dissimilar welding of a Ni/Cu couple. The events at the Ni and the Cu interface are very different, which illustrate the importance of the phase diagram through the slope of the liquidus curves. In the Ni side, where the liquidus temperature decreases with increasing alloying, solutal melting of the base metal takes place; the resolidification, with continuously increasing solid composition, is very sluggish until the interface encounters a homogeneous melt composition. The growth difficulty of the base metal increases with increasing initial melt composition, which is equivalent to a steeper slope of the liquidus curve. In the Cu side, the initial conditions result in a deeply undercooled melt and contributions from both constrained and unconstrained modes of growth are observed. The simulations bring out the possibility of nucleation of a concentrated solid phase from the melt, and a secondary melting of the substrate due to the associated recalescence event. The results for the Ni and Cu interfaces can be used to understand more complex dissimilar weld interfaces involving multiphase solidification.

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Fibre laser welding of dissimilar alloys of Ti-6Al-4V and Inconel 718 for aerospace applications

Chen

Pinkerton

2010

Int J Adv Manuf Technol

194

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Microstructure development during dissimilar welding: Case of laser welding of Ti with Ni involving intermetallic phase formation

Cited by 62 publications

References 20 publications

Influence of the Overlapping Factor and Welding Speed on T-Joint Welding of Ti6Al4V and Inconel 600 Using Low-Power Fiber Laser

Influence of the Overlapping Factor and Welding Speed on T-Joint Welding of Ti6Al4V and Inconel 600 Using Low-Power Fiber Laser

Phase-Field Simulation of Fusion Interface Events during Solidification of Dissimilar Welds: Effect of Composition Inhomogeneity

Fibre laser welding of dissimilar alloys of Ti-6Al-4V and Inconel 718 for aerospace applications

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